﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Example13_CSharp
{
    class CPolygon
    {
        protected int width, height;
        public CPolygon(int a)
        {
            width = a;
        }
        public void setValues(int a, int b)
        {
            width = a;
            height = b;
        }
        class CRectangle : CPolygon
        {
            public CRectangle(int w, int h)
                : base(w)
            {
                height = h;
            }
            public int area()
            {
                return (width * height);
            }

        }
        static void Main(string[] args)
        {
            CRectangle rect = new CRectangle(8, 9);
            Console.WriteLine("rect a:{0}", rect.area());


        }
    }
}
